AA 2389 then ET 3511 at O'Hare
Calgary → Chicago → Muscat
Timetable, Chicago time
18:44AA 2389 from Calgary at the gate
09:05ET 3511 to Muscat leaves the gate
14 h 21 apart on the timetable, overnight
ET 3511 leaves 14 h 21 after AA 2389 arrives on the timetable: more than half a day, so not a connection we count.